alpha-particle condensation in O-16 studied with a full four-body orthogonality condition model calculation

作者：Funaki Y^*; Yamada T; Horiuchi H; Roepke G; Schuck P; Tohsaki A

来源：Physical Review Letters, 2008, 101(8): 082502.

DOI：10.1103/PhysRevLett.101.082502

To explore the four-alpha-particle condensate state in O-16, we solve a full four-body equation of motion based on the four-alpha-particle orthogonality condition model in a large four-alpha-particle model space spanned by Gaussian basis functions. A full spectrum up to the 0(6)(+) state is reproduced consistently with the lowest six 0(+) states of the experimental spectrum. The 0(6)(+) state is obtained at about 2 MeV above the four-alpha-particle breakup threshold and has a dilute density structure, with a radius of about 5 fm. The state has an appreciably large alpha condensate fraction of 61%, and a large component of alpha+C-12(0(2)(+)) configuration, both features being reliable evidence for this state to be of four-alpha-particle condensate nature.

• 出版日期2008-8-22